Text.HTML.TagSoup.Tree.Util

Utility functions for TagSoup's TagTree.

Documentation

children :: TagTree str -> [TagTree str]

Returns all immediate children of a TagTree.

descendants :: TagTree str -> [TagTree str]

Returns all immediate children, the children of these children etc. for a TagTree.

withTagTree :: (str -> [Attribute str] -> [TagTree str] -> a) -> (Tag str -> a) -> TagTree str -> a

Case analysis for TagTree values.

isTagBranch :: TagTree str -> Bool

Checks if the given tree is a TagBranch.

isTagLeaf :: TagTree str -> Bool

Checks if the given tree is a TagLeaf.

tagBranchName :: TagTree str -> str

Returns the element name of a TagBranch, or an error if the tree is a TagLeaf.

tagBranchAttrs :: TagTree str -> [Attribute str]

Returns the attribute list of a TagBranch, or an error if the tree is a TagLeaf.

tagBranchTrees :: TagTree str -> [TagTree str]

Returns the subtrees of a TagBranch, or an error if the tree is a TagLeaf.

fromTagLeaf :: TagTree str -> Tag str

Returns the inner Tag value if the tree is a TagLeaf, or an error otherwise.

maybeTagBranchName :: TagTree str -> Maybe str

maybeTagBranchAttrs :: TagTree str -> Maybe [Attribute str]

maybeTagBranchTrees :: TagTree str -> Maybe [TagTree str]

maybeTagLeafTag :: TagTree str -> Maybe (Tag str)

hasTagBranchName :: Eq str => str -> TagTree str -> Bool

hasTagBranchAttr :: Eq str => str -> TagTree str -> Bool

findTagBranchAttr :: Eq str => str -> TagTree str -> Maybe str

tagTree' :: StringLike str => [Tag str] -> [TagTree str]

An alternative tagTree version. The original version sometimes yields unsatisfying results if the tag soup includes several spurious opening or closing tags. This version tries harder to balance them properly.

htmlRoot :: [TagTree String] -> TagTree String

Tries to find the html branch in a TagTree. If no branch with that name exists, a new html branch is returned with the input trees as its immediate children.